26" is the wheel size you know that right...just like a 20" is a 20" wheel size lol
"Different Bicycle Sizes?
Bicycle frame sizes and tire sizes differ, but neither of these apply when talking about whether a bicycle is 16 inches, 24 inches, 26 inches, 27 inches or 700 millimetres. These designations can be confusing, but one wonders how a manufacturer determines what to call a push bike's rim size.
The Inches Refer to Rim Size
A bicycle size refers to the diameter of the tire's rim. Bicycles sizes are commonly given in inches. Newer street bikes will be referred to as 700 millimetres, however. 26-inch bicycles, for example, are not always the same size. Often this variation is due to differences between bicycle manufacturers."
Read more: How Are Bike Sizes Measured? | eHow.com
http://www.ehow.com/how-does_5081878_bike-sizes-measured.html#ixzz1vpfYp3g